[gdal-dev] Reading NetCDF using VB.NET

[Etienne Tourigny]

On Sat, Jun 16, 2012 at 4:33 PM, Siebe Bosch <siebe at hydroconsult.nl> wrote:
> Following your third link, I had already found the section that reads:
>
> GDAL and MapServer build SDK packages (provides to compile MapServer and
> GDAL by yourself):
>
> I assumed that this meant that I had to compile the DLL myself. Hence my
> previous mail.
>
> Considering your last mail however I tried to look up a pre-built DLL inside
> the SDK, and I found this one:
> c:\GDALVS\release-1600\bin\gdal\csharp\gdal_csharp.dll

release-1600 is for VS2010, not VS2008

>
> Is this the correct one?
>
> I can add it to VS2008, however VS warns me that "the system cannot find the
> reference specified".
>
>
>
>
>
>
> On 14-06-12 20:51, Etienne Tourigny wrote:
>
> If you read the GDAL download page [1] you will find this:
>
> "The latest FWtools version for Windows, 2.4.7, dates back to a
> pre-1.6 GDAL version. In order to benefit from the latest and
> greatest, you can refer to the other binary builds mentionned above."
>
> If you want to support netcdf files, you should probably be using a
> more recent gdal, at least 1.9
>
> That means you should probably not use FWTools, and use the SDK from
> Tamas Szekeres [3] - which according to [2] supports vb.net (C#)
>
> [1] http://trac.osgeo.org/gdal/wiki/DownloadingGdalBinaries
> [2] http://trac.osgeo.org/gdal/wiki/GdalOgrInCsharp
> [3] http://vbkto.dyndns.org/sdk/
>
> cheers
> Etienne
>
> On Thu, Jun 14, 2012 at 2:08 PM, Siebe Bosch <siebe at hydroconsult.nl> wrote:
>
> Hello all,
>
> I'm trying to build a command line application in VB.NET that extracts parts
> from a NetCDF file.
> For this I'm using the C# API as supplied with FWTools version 2.4.7. It's
> supposed to support VB.NET as well; am I right?
>
> However, the application already crashes at the line Call GDAL.Registerall()
> Here's the code:
>
> Imports System
> Imports OSGeo.GDAL
> Imports OSGeo.OGR
>
> Module MeteoBase
>
>  'Copyright Siebe Bosch Hydroconsult, 2012
>  'Lulofsstraat 55, unit 47 Den Haag, The Netherlands
>  'this program creates subsets from precipitation data in NetCDF-files
>  'as requested by the user. The program is designed to be called from
>  'a PHP-script.
>
>  Dim FileName As String
>  Dim ds As Dataset
>
>  Sub Main()
>    Dim DebugMode As Boolean
>
>    Console.WriteLine("This program extracts data from a NetCDF file")
>    Console.WriteLine("Path to the NetCDF file (*.cn)")
>    DebugMode = True
>
>    'start reading the command line arguments
>    If DebugMode Then
>      FileName = "c:\GDAL\PM\1990\EVAP_PM_19901231.nc"
>    Else
>      If My.Application.CommandLineArgs.Count = 0 Then
>        Console.WriteLine("Enter the path to the NetCDF-file:")
>        FileName = Console.ReadLine()
>      ElseIf My.Application.CommandLineArgs.Count <> 1 Then
>        Console.WriteLine("Error: incorrect number of arguments presented")
>      Else
>        FileName = My.Application.CommandLineArgs(0)
>      End If
>    End If
>
>    Try
>      'start reading the NetCDF File
>      Call Gdal.AllRegister()
>      ds = Gdal.Open(FileName, Access.GA_ReadOnly)
>      If ds Is Nothing Then
>        Console.WriteLine("Cannot open NetCDF file: " & FileName)
>        Throw New Exception
>      Else
>        Console.WriteLine("Raster dataset parameters:")
>        Console.WriteLine("  Projection: " + ds.GetProjectionRef())
>        Console.WriteLine("  RasterCount: " + ds.RasterCount)
>        Console.WriteLine("  RasterSize (" + ds.RasterXSize + "," +
> ds.RasterYSize + ")")
>      End If
>    Catch ex As Exception
>      Console.WriteLine("Error in sub Main of Meteobase")
>    End Try
>
>  End Sub
>
> End Module
>
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>
>
> --
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>
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